"Foreign Ministry sent notes to the countries of vessels-offenders to provide official explanations about the violations of the order of entry and exit to the temporarily occupied territory of Ukraine," he said.
Perebyinis said that, according to the State Inspectorate for safety at sea and river transport, the Crimean sea ports closed by Ukraine have 99 vessels: 48 - under the flag of Russia, 4 - Moldova, 2 - Italy, 2 - Cyprus, 1 - Portugal, 1 - Malta and the rest under the flags of island states.
"Based on the information of the Ministry of Infrastructure, the Ministry of Foreign Affairs officially informs the International Maritime Organization of foreign states' non-compliance of the 1982 UN Convention on the Law of the Sea, and other international documents," he added.
According to Perebyinis, as of early December, the Prosecutor General's Office has initiated and is investigating 69 criminal cases concerning the mentioned offenses.
Earlier, the Foreign Ministry sent a protest note to Russia in connection with the opening of five sea ports in Crimea.